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--- zeppelin/site/docs/0.8.2/interpreter/lens.html (added)
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@@ -0,0 +1,419 @@
+
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <title>Apache Zeppelin 0.8.0 Documentation: Lens Interpreter for Apache
Zeppelin</title>
+ <meta name="description" content="Apache Lens provides an Unified
Analytics interface. Lens aims to cut the Data Analytics silos by providing a
single view of data across multiple tiered data stores and optimal execution
environment for the analytical query. It seamlessly integrates Hadoop with
traditional data warehouses to appear like one.">
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using Frontend API</a></li>
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Impersonation</a></li>
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Management</a></li>
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Interpreters</a></li>
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Loading (Experimental)</a></li>-->
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(Experimental)</a></li>
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+ <li class="title"><span>Other Features</span></li>
+ <li><a
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Paragraphs</a></li>
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Zeppelin Homepage</a></li>
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Actions</a></li>
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Scheduler</a></li>
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href="/docs/0.8.0/usage/other_features/zeppelin_context.html">Zeppelin
Context</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>REST API</span></li>
+ <li><a
href="/docs/0.8.0/usage/rest_api/interpreter.html">Interpreter API</a></li>
+ <li><a
href="/docs/0.8.0/usage/rest_api/zeppelin_server.html">Zeppelin Server
API</a></li>
+ <li><a
href="/docs/0.8.0/usage/rest_api/notebook.html">Notebook API</a></li>
+ <li><a
href="/docs/0.8.0/usage/rest_api/notebook_repository.html">Notebook Repository
API</a></li>
+ <li><a
href="/docs/0.8.0/usage/rest_api/configuration.html">Configuration API</a></li>
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href="/docs/0.8.0/usage/rest_api/credential.html">Credential API</a></li>
+ <li><a href="/docs/0.8.0/usage/rest_api/helium.html">Helium
API</a></li>
+ </ul>
+ </li>
+
+ <li>
+ <a href="#" data-toggle="dropdown"
class="dropdown-toggle">Setup<b class="caret"></b></a>
+ <ul class="dropdown-menu scrollable-menu">
+ <li class="title"><span>Basics</span></li>
+ <li><a href="/docs/0.8.0/setup/basics/how_to_build.html">How
to Build Zeppelin</a></li>
+ <li><a
href="/docs/0.8.0/setup/basics/multi_user_support.html">Multi-user
Support</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Deployment</span></li>
+ <!--<li><a
href="/docs/0.8.0/setup/deployment/docker.html">Docker Image for
Zeppelin</a></li>-->
+ <li><a
href="/docs/0.8.0/setup/deployment/spark_cluster_mode.html#spark-standalone-mode">Spark
Cluster Mode: Standalone</a></li>
+ <li><a
href="/docs/0.8.0/setup/deployment/spark_cluster_mode.html#spark-on-yarn-mode">Spark
Cluster Mode: YARN</a></li>
+ <li><a
href="/docs/0.8.0/setup/deployment/spark_cluster_mode.html#spark-on-mesos-mode">Spark
Cluster Mode: Mesos</a></li>
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href="/docs/0.8.0/setup/deployment/flink_and_spark_cluster.html">Zeppelin with
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on CDH</a></li>
+ <li><a
href="/docs/0.8.0/setup/deployment/virtual_machine.html">Zeppelin on VM:
Vagrant</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Security</span></li>
+ <li><a
href="/docs/0.8.0/setup/security/authentication_nginx.html">HTTP Basic Auth
using NGINX</a></li>
+ <li><a
href="/docs/0.8.0/setup/security/shiro_authentication.html">Shiro
Authentication</a></li>
+ <li><a
href="/docs/0.8.0/setup/security/notebook_authorization.html">Notebook
Authorization</a></li>
+ <li><a
href="/docs/0.8.0/setup/security/datasource_authorization.html">Data Source
Authorization</a></li>
+ <li><a
href="/docs/0.8.0/setup/security/http_security_headers.html">HTTP Security
Headers</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Notebook Storage</span></li>
+ <li><a
href="/docs/0.8.0/setup/storage/storage.html#notebook-storage-in-local-git-repository">Git
Storage</a></li>
+ <li><a
href="/docs/0.8.0/setup/storage/storage.html#notebook-storage-in-s3">S3
Storage</a></li>
+ <li><a
href="/docs/0.8.0/setup/storage/storage.html#notebook-storage-in-azure">Azure
Storage</a></li>
+ <li><a
href="/docs/0.8.0/setup/storage/storage.html#notebook-storage-in-zeppelinhub">ZeppelinHub
Storage</a></li>
+ <li><a
href="/docs/0.8.0/setup/storage/storage.html#notebook-storage-in-mongodb">MongoDB
Storage</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Operation</span></li>
+ <li><a
href="/docs/0.8.0/setup/operation/configuration.html">Configuration</a></li>
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+ <li><a
href="/docs/0.8.0/setup/operation/upgrading.html">Upgrading</a></li>
+ <li><a
href="/docs/0.8.0/setup/operation/trouble_shooting.html">Trouble
Shooting</a></li>
+ </ul>
+ </li>
+
+ <li>
+ <a href="#" data-toggle="dropdown"
class="dropdown-toggle">Interpreter <b class="caret"></b></a>
+ <ul class="dropdown-menu scrollable-menu">
+ <li class="title"><span>Interpreters</span></li>
+ <li><a
href="/docs/0.8.0/usage/interpreter/overview.html">Overview</a></li>
+ <li role="separator" class="divider"></li>
+ <li><a href="/docs/0.8.0/interpreter/spark.html">Spark</a></li>
+ <li><a href="/docs/0.8.0/interpreter/jdbc.html">JDBC</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/python.html">Python</a></li>
+ <li role="separator" class="divider"></li>
+ <li><a
href="/docs/0.8.0/interpreter/alluxio.html">Alluxio</a></li>
+ <li><a href="/docs/0.8.0/interpreter/beam.html">Beam</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/bigquery.html">BigQuery</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/cassandra.html">Cassandra</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/elasticsearch.html">Elasticsearch</a></li>
+ <li><a href="/docs/0.8.0/interpreter/flink.html">Flink</a></li>
+ <li><a href="/docs/0.8.0/interpreter/geode.html">Geode</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/groovy.html">Groovy</a></li>
+ <li><a href="/docs/0.8.0/interpreter/hbase.html">HBase</a></li>
+ <li><a href="/docs/0.8.0/interpreter/hdfs.html">HDFS</a></li>
+ <li><a href="/docs/0.8.0/interpreter/hive.html">Hive</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/ignite.html">Ignite</a></li>
+ <li><a href="/docs/0.8.0/interpreter/kylin.html">Kylin</a></li>
+ <li><a href="/docs/0.8.0/interpreter/lens.html">Lens</a></li>
+ <li><a href="/docs/0.8.0/interpreter/livy.html">Livy</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/markdown.html">Markdown</a></li>
+ <li><a href="/docs/0.8.0/interpreter/neo4j.html">Neo4j</a></li>
+ <li><a href="/docs/0.8.0/interpreter/pig.html">Pig</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/postgresql.html">Postgresql, HAWQ</a></li>
+ <li><a href="/docs/0.8.0/interpreter/r.html">R</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/scalding.html">Scalding</a></li>
+ <li><a href="/docs/0.8.0/interpreter/scio.html">Scio</a></li>
+ <li><a href="/docs/0.8.0/interpreter/shell.html">Shell</a></li>
+ </ul>
+ </li>
+ <li>
+ <a href="#" data-toggle="dropdown"
class="dropdown-toggle">More<b class="caret"></b></a>
+ <ul class="dropdown-menu scrollable-menu" style="right: 0; left:
auto;">
+ <li class="title"><span>Extending Zeppelin</span></li>
+ <li><a
href="/docs/0.8.0/development/writing_zeppelin_interpreter.html">Writing
Zeppelin Interpreter</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Helium (Experimental)</span></li>
+ <li><a
href="/docs/0.8.0/development/helium/overview.html">Overview</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_application.html">Writing Helium
Application</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_spell.html">Writing Helium
Spell</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_visualization_basic.html">Writing
Helium Visualization: Basics</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_visualization_transformation.html">Writing
Helium Visualization: Transformation</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Contributing to Zeppelin</span></li>
+ <li><a href="/docs/0.8.0/setup/basics/how_to_build.html">How
to Build Zeppelin</a></li>
+ <li><a
href="/docs/0.8.0/development/contribution/useful_developer_tools.html">Useful
Developer Tools</a></li>
+ <li><a
href="/docs/0.8.0/development/contribution/how_to_contribute_code.html">How to
Contribute (code)</a></li>
+ <li><a
href="/docs/0.8.0/development/contribution/how_to_contribute_website.html">How
to Contribute (website)</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>External Resources</span></li>
+ <li><a target="_blank" href="">Mailing List</a></li>
+ <li><a target="_blank" href="">Apache Zeppelin Wiki</a></li>
+ <li><a target="_blank" href="">Stackoverflow Questions about
Zeppelin</a></li>
+ </ul>
+ </li>
+ <li>
+ <a href="/docs/0.8.0/search.html" class="nav-search-link">
+ <span class="fa fa-search nav-search-icon"></span>
+ </a>
+ </li>
+ </ul>
+ </nav><!--/.navbar-collapse -->
+ </div>
+ </div>
+
+
+
+ <div class="content">
+
+<!--<div class="hero-unit Lens Interpreter for Apache Zeppelin">
+ <h1></h1>
+</div>
+-->
+
+<div class="row">
+ <div class="col-md-12">
+ <!--
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+<h1>Lens Interpreter for Apache Zeppelin</h1>
+
+<div id="toc"></div>
+
+<h2>Overview</h2>
+
+<p><a href="https://lens.apache.org/";>Apache Lens</a> provides an Unified
Analytics interface. Lens aims to cut the Data Analytics silos by providing a
single view of data across multiple tiered data stores and optimal execution
environment for the analytical query. It seamlessly integrates Hadoop with
traditional data warehouses to appear like one.</p>
+
+<p><img src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/lens-logo.png"
alt="Apache Lens"></p>
+
+<h2>Installing and Running Lens</h2>
+
+<p>In order to use Lens interpreters, you may install Apache Lens in some
simple steps:</p>
+
+<ol>
+<li>Download Lens for latest version from <a
href="http://www.apache.org/dyn/closer.lua/lens/2.3-beta";>the ASF</a>. Or the
older release can be found <a href="http://archive.apache.org/dist/lens/";>in
the Archives</a>.</li>
+<li>Before running Lens, you have to set HIVE<em>HOME and HADOOP</em>HOME. If
you want to get more information about this, please refer to <a
href="http://lens.apache.org/lenshome/install-and-run.html#Installation";>here</a>.
Lens also provides Pseudo Distributed mode. <a
href="http://lens.apache.org/lenshome/pseudo-distributed-setup.html";>Lens
pseudo-distributed setup</a> is done by using <a
href="https://www.docker.com/";>docker</a>. Hive server and hadoop daemons are
run as separate processes in lens pseudo-distributed setup.</li>
+<li>Now, you can start lens server (or stop).</li>
+</ol>
+<div class="highlight"><pre><code class="language-bash"
data-lang="bash"><span></span>./bin/lens-ctl start <span class="c1"># (or
stop)</span>
+</code></pre></div>
+<h2>Configuring Lens Interpreter</h2>
+
+<p>At the "Interpreters" menu, you can edit Lens interpreter or
create new one. Zeppelin provides these properties for Lens.</p>
+
+<table class="table-configuration">
+ <tr>
+ <th>Property Name</th>
+ <th>value</th>
+ <th>Description</th>
+ </tr>
+ <tr>
+ <td>lens.client.dbname</td>
+ <td>default</td>
+ <td>The database schema name</td>
+ </tr>
+ <tr>
+ <td>lens.query.enable.persistent.resultset</td>
+ <td>false</td>
+ <td>Whether to enable persistent resultset for queries. When enabled,
server will fetch results from driver, custom format them if any and store in a
configured location. The file name of query output is queryhandle-id, with
configured extensions</td>
+ </tr>
+ <tr>
+ <td>lens.server.base.url</td>
+ <td>http://hostname:port/lensapi</td>
+ <td>The base url for the lens server. you have to edit "hostname" and
"port" that you may use(ex. http://0.0.0.0:9999/lensapi)</td>
+ </tr>
+ <tr>
+ <td>lens.session.cluster.user </td>
+ <td>default</td>
+ <td>Hadoop cluster username</td>
+ </tr>
+ <tr>
+ <td>zeppelin.lens.maxResult</td>
+ <td>1000</td>
+ <td>Max number of rows to display</td>
+ </tr>
+ <tr>
+ <td>zeppelin.lens.maxThreads</td>
+ <td>10</td>
+ <td>If concurrency is true then how many threads?</td>
+ </tr>
+ <tr>
+ <td>zeppelin.lens.run.concurrent</td>
+ <td>true</td>
+ <td>Run concurrent Lens Sessions</td>
+ </tr>
+ <tr>
+ <td>xxx</td>
+ <td>yyy</td>
+ <td>anything else from [Configuring lens
server](https://lens.apache.org/admin/config-server.html)</td>
+ </tr>
+</table>
+
+<p><img
src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/lens-interpreter-setting.png"
alt="Apache Lens Interpreter Setting"></p>
+
+<h3>Interpreter Binding for Zeppelin Notebook</h3>
+
+<p>After configuring Lens interpreter, create your own notebook, then you can
bind interpreters like below image.</p>
+
+<p><img
src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/lens-interpreter-binding.png"
alt="Zeppelin Notebook Interpreter Binding"></p>
+
+<p>For more interpreter binding information see <a
href="../usage/interpreter/overview.html#interpreter-binding-mode">here</a>.</p>
+
+<h3>How to use</h3>
+
+<p>You can analyze your data by using <a
href="http://lens.apache.org/user/olap-cube.html";>OLAP Cube</a> <a
href="http://lens.apache.org/user/cli.html";>QL</a> which is a high level SQL
like language to query and describe data sets organized in data cubes.
+You may experience OLAP Cube like this <a
href="https://cwiki.apache.org/confluence/display/LENS/2015/07/13/20+Minute+video+demo+of+Apache+Lens+through+examples";>Video
tutorial</a>.
+As you can see in this video, they are using Lens Client
Shell(<code>./bin/lens-cli.sh</code>). All of these functions also can be used
on Zeppelin by using Lens interpreter.</p>
+
+<p><li> Create and Use (Switch) Databases.</p>
+<div class="highlight"><pre><code class="language-sql"
data-lang="sql"><span></span><span class="k">create</span> <span
class="k">database</span> <span class="n">newDb</span>
+</code></pre></div><div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>use newDb
+</code></pre></div>
+<p><li> Create Storage.</p>
+<div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>create storage
your/path/to/lens/client/examples/resources/db-storage.xml
+</code></pre></div>
+<p><li> Create Dimensions, Show fields and join-chains of them.</p>
+<div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>create dimension
your/path/to/lens/client/examples/resources/customer.xml
+</code></pre></div><div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>dimension show fields customer
+</code></pre></div><div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>dimension show joinchains customer
+</code></pre></div>
+<p><li> Create Caches, Show fields and join-chains of them.</p>
+<div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>create cube
your/path/to/lens/client/examples/resources/sales-cube.xml
+</code></pre></div><div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>cube show fields sales
+</code></pre></div><div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>cube show joinchains sales
+</code></pre></div>
+<p><li> Create Dimtables and Fact.</p>
+<div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>create dimtable
your/path/to/lens/client/examples/resources/customer_table.xml
+</code></pre></div><div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>create fact
your/path/to/lens/client/examples/resources/sales-raw-fact.xml
+</code></pre></div>
+<p><li> Add partitions to Dimtable and Fact.</p>
+<div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>dimtable add single-partition --dimtable_name
customer_table --storage_name local
+--path your/path/to/lens/client/examples/resources/customer-local-part.xml
+</code></pre></div><div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>fact add partitions --fact_name sales_raw_fact
--storage_name local
+--path your/path/to/lens/client/examples/resources/sales-raw-local-parts.xml
+</code></pre></div>
+<p><li> Now, you can run queries on cubes.</p>
+<div class="highlight"><pre><code class="language-text"
data-lang="text"><span></span>query execute cube select customer_city_name,
product_details.description,
+product_details.category, product_details.color, store_sales from sales
+where time_range_in(delivery_time, '2015-04-11-00',
'2015-04-13-00')
+</code></pre></div>
+<p><img src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/lens-result.png"
alt="Lens Query Result"></p>
+
+<p>These are just examples that provided in advance by Lens. If you want to
explore whole tutorials of Lens, see the <a
href="https://cwiki.apache.org/confluence/display/LENS/2015/07/13/20+Minute+video+demo+of+Apache+Lens+through+examples";>tutorial
video</a>.</p>
+
+<h2>Lens UI Service</h2>
+
+<p>Lens also provides web UI service. Once the server starts up, you can open
the service on http://serverhost:19999/index.html and browse. You may also
check the structure that you made and use query easily here.</p>
+
+<p><img
src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/lens-ui-service.png"
alt="Lens UI Service"></p>
+
+ </div>
+</div>
+
+
+ <hr>
+ <footer>
+ <!-- <p>© 2019 The Apache Software Foundation</p>-->
+ </footer>
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+
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+ ga('require', 'linkid', 'linkid.js');
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+ </body>
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+
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svn:executable = *
Added: zeppelin/site/docs/0.8.2/interpreter/mahout.html
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==============================================================================
--- zeppelin/site/docs/0.8.2/interpreter/mahout.html (added)
+++ zeppelin/site/docs/0.8.2/interpreter/mahout.html Sun Sep 29 07:08:10 2019
@@ -0,0 +1,469 @@
+
+<!DOCTYPE html>
+<html lang="en">
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+ <meta charset="utf-8">
+ <title>Apache Zeppelin 0.8.0 Documentation: Mahout Interpreter for Apache
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+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Interpreter</span></li>
+ <li><a
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Management</a></li>
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(Experimental)</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Other Features</span></li>
+ <li><a
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Paragraphs</a></li>
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href="/docs/0.8.0/usage/other_features/customizing_homepage.html">Customizing
Zeppelin Homepage</a></li>
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Actions</a></li>
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+ <li class="title"><span>REST API</span></li>
+ <li><a
href="/docs/0.8.0/usage/rest_api/interpreter.html">Interpreter API</a></li>
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API</a></li>
+ </ul>
+ </li>
+
+ <li>
+ <a href="#" data-toggle="dropdown"
class="dropdown-toggle">Setup<b class="caret"></b></a>
+ <ul class="dropdown-menu scrollable-menu">
+ <li class="title"><span>Basics</span></li>
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to Build Zeppelin</a></li>
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+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Security</span></li>
+ <li><a
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+-->
+
+<h1>Apache Mahout Interpreter for Apache Zeppelin</h1>
+
+<div id="toc"></div>
+
+<h2>Installation</h2>
+
+<p>Apache Mahout is a collection of packages that enable machine learning and
matrix algebra on underlying engines such as Apache Flink or Apache Spark. A
convenience script for creating and configuring two Mahout enabled interpreters
exists. The <code>%sparkMahout</code> and <code>%flinkMahout</code>
interpreters do not exist by default but can be easily created using this
script. </p>
+
+<h3>Easy Installation</h3>
+
+<p>To quickly and easily get up and running using Apache Mahout, run the
following command from the top-level directory of the Zeppelin install:</p>
+<div class="highlight"><pre><code class="language-bash"
data-lang="bash"><span></span>python scripts/mahout/add_mahout.py
+</code></pre></div>
+<p>This will create the <code>%sparkMahout</code> and
<code>%flinkMahout</code> interpreters, and restart Zeppelin.</p>
+
+<h3>Advanced Installation</h3>
+
+<p>The <code>add_mahout.py</code> script contains several command line
arguments for advanced users.</p>
+
+<p><table class="table-configuration">
+ <tr>
+ <th>Argument</th>
+ <th>Description</th>
+ <th>Example</th>
+ </tr>
+ <tr>
+ <td><code>--zeppelin_home</code></td>
+ <td>This is the path to the Zeppelin installation. This flag is not
needed if the script is run from the top-level installation directory or from
the <code>zeppelin/scripts/mahout</code> directory.</td>
+ <td><code>/path/to/zeppelin</code></td>
+ </tr>
+ <tr>
+ <td><code>--mahout_home</code></td>
+ <td>If the user has already installed Mahout, this flag can set the path
to <code>MAHOUT_HOME</code>. If this is set, downloading Mahout will be
skipped.</td>
+ <td><code>/path/to/mahout_home</code></td>
+ </tr>
+ <tr>
+ <td><code>--restart_later</code></td>
+ <td>Restarting is necessary for updates to take effect. By default the
script will restart Zeppelin for you. Restart will be skipped if this flag is
set.</td>
+ <td>NA</td>
+ </tr>
+ <tr>
+ <td><code>--force_download</code></td>
+ <td>This flag will force the script to re-download the binary even if it
already exists. This is useful for previously failed downloads.</td>
+ <td>NA</td>
+ </tr>
+ <tr>
+ <td><code>--overwrite_existing</code></td>
+ <td>This flag will force the script to overwrite existing
<code>%sparkMahout</code> and <code>%flinkMahout</code> interpreters. Useful
when you want to just start over.</td>
+ <td>NA</td>
+ </tr>
+</table></p>
+
+<p><strong>NOTE 1:</strong> Apache Mahout at this time only supports Spark 1.5
and Spark 1.6 and Scala 2.10. If the user is using another version of Spark
(e.g. 2.0), the <code>%sparkMahout</code> will likely not work. The
<code>%flinkMahout</code> interpreter will still work and the user is
encouraged to develop with that engine as the code can be ported via copy and
paste, as is evidenced by the tutorial notebook.</p>
+
+<p><strong>NOTE 2:</strong> If using Apache Flink in cluster mode, the
following libraries will also need to be coppied to
<code>${FLINK_HOME}/lib</code>
+- mahout-math-0.12.2.jar
+- mahout-math-scala<em>2.10-0.12.2.jar
+- mahout-flink</em>2.10-0.12.2.jar
+- mahout-hdfs-0.12.2.jar
+- <a
href="http://central.maven.org/maven2/com/google/guava/guava/14.0.1/guava-14.0.1.jar";>com.google.guava:guava:14.0.1</a></p>
+
+<h2>Overview</h2>
+
+<p>The <a href="http://mahout.apache.org/";>Apache Mahout</a>⢠project's
goal is to build an environment for quickly creating scalable performant
machine learning applications.</p>
+
+<p>Apache Mahout software provides three major features:</p>
+
+<ul>
+<li>A simple and extensible programming environment and framework for building
scalable algorithms</li>
+<li>A wide variety of premade algorithms for Scala + Apache Spark, H2O, Apache
Flink</li>
+<li>Samsara, a vector math experimentation environment with R-like syntax
which works at scale</li>
+</ul>
+
+<p>In other words:</p>
+
+<p><em>Apache Mahout provides a unified API for quickly creating machine
learning algorithms on a variety of engines.</em></p>
+
+<h2>How to use</h2>
+
+<p>When starting a session with Apache Mahout, depending on which engine you
are using (Spark or Flink), a few imports must be made and a <em>Distributed
Context</em> must be declared. Copy and paste the following code and run once
to get started.</p>
+
+<h3>Flink</h3>
+<div class="highlight"><pre><code class="language-scala"
data-lang="scala"><span></span><span class="o">%</span><span
class="n">flinkMahout</span>
+
+<span class="k">import</span> <span
class="nn">org.apache.flink.api.scala._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.math.drm._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.math.drm.RLikeDrmOps._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.flinkbindings._</span>
+<span class="k">import</span> <span class="nn">org.apache.mahout.math._</span>
+<span class="k">import</span> <span class="nn">scalabindings._</span>
+<span class="k">import</span> <span class="nn">RLikeOps._</span>
+
+<span class="k">implicit</span> <span class="k">val</span> <span
class="n">ctx</span> <span class="k">=</span> <span class="k">new</span> <span
class="nc">FlinkDistributedContext</span><span class="o">(</span><span
class="n">benv</span><span class="o">)</span>
+</code></pre></div>
+<h3>Spark</h3>
+<div class="highlight"><pre><code class="language-scala"
data-lang="scala"><span></span><span class="o">%</span><span
class="n">sparkMahout</span>
+
+<span class="k">import</span> <span class="nn">org.apache.mahout.math._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.math.scalabindings._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.math.drm._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.math.scalabindings.RLikeOps._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.math.drm.RLikeDrmOps._</span>
+<span class="k">import</span> <span
class="nn">org.apache.mahout.sparkbindings._</span>
+
+<span class="k">implicit</span> <span class="k">val</span> <span
class="n">sdc</span><span class="k">:</span> <span
class="kt">org.apache.mahout.sparkbindings.SparkDistributedContext</span> <span
class="o">=</span> <span class="n">sc2sdc</span><span class="o">(</span><span
class="n">sc</span><span class="o">)</span>
+</code></pre></div>
+<h3>Same Code, Different Engines</h3>
+
+<p>After importing and setting up the distributed context, the Mahout R-Like
DSL is consistent across engines. The following code will run in both
<code>%flinkMahout</code> and <code>%sparkMahout</code></p>
+<div class="highlight"><pre><code class="language-scala"
data-lang="scala"><span></span><span class="k">val</span> <span
class="n">drmData</span> <span class="k">=</span> <span
class="n">drmParallelize</span><span class="o">(</span><span
class="n">dense</span><span class="o">(</span>
+ <span class="o">(</span><span class="mi">2</span><span class="o">,</span>
<span class="mi">2</span><span class="o">,</span> <span
class="mf">10.5</span><span class="o">,</span> <span class="mi">10</span><span
class="o">,</span> <span class="mf">29.509541</span><span class="o">),</span>
<span class="c1">// Apple Cinnamon Cheerios</span>
+ <span class="o">(</span><span class="mi">1</span><span class="o">,</span>
<span class="mi">2</span><span class="o">,</span> <span
class="mi">12</span><span class="o">,</span> <span class="mi">12</span><span
class="o">,</span> <span class="mf">18.042851</span><span class="o">),</span>
<span class="c1">// Cap'n'Crunch</span>
+ <span class="o">(</span><span class="mi">1</span><span class="o">,</span>
<span class="mi">1</span><span class="o">,</span> <span
class="mi">12</span><span class="o">,</span> <span class="mi">13</span><span
class="o">,</span> <span class="mf">22.736446</span><span class="o">),</span>
<span class="c1">// Cocoa Puffs</span>
+ <span class="o">(</span><span class="mi">2</span><span class="o">,</span>
<span class="mi">1</span><span class="o">,</span> <span
class="mi">11</span><span class="o">,</span> <span class="mi">13</span><span
class="o">,</span> <span class="mf">32.207582</span><span class="o">),</span>
<span class="c1">// Froot Loops</span>
+ <span class="o">(</span><span class="mi">1</span><span class="o">,</span>
<span class="mi">2</span><span class="o">,</span> <span
class="mi">12</span><span class="o">,</span> <span class="mi">11</span><span
class="o">,</span> <span class="mf">21.871292</span><span class="o">),</span>
<span class="c1">// Honey Graham Ohs</span>
+ <span class="o">(</span><span class="mi">2</span><span class="o">,</span>
<span class="mi">1</span><span class="o">,</span> <span
class="mi">16</span><span class="o">,</span> <span class="mi">8</span><span
class="o">,</span> <span class="mf">36.187559</span><span class="o">),</span>
<span class="c1">// Wheaties Honey Gold</span>
+ <span class="o">(</span><span class="mi">6</span><span class="o">,</span>
<span class="mi">2</span><span class="o">,</span> <span
class="mi">17</span><span class="o">,</span> <span class="mi">1</span><span
class="o">,</span> <span class="mf">50.764999</span><span class="o">),</span>
<span class="c1">// Cheerios</span>
+ <span class="o">(</span><span class="mi">3</span><span class="o">,</span>
<span class="mi">2</span><span class="o">,</span> <span
class="mi">13</span><span class="o">,</span> <span class="mi">7</span><span
class="o">,</span> <span class="mf">40.400208</span><span class="o">),</span>
<span class="c1">// Clusters</span>
+ <span class="o">(</span><span class="mi">3</span><span class="o">,</span>
<span class="mi">3</span><span class="o">,</span> <span
class="mi">13</span><span class="o">,</span> <span class="mi">4</span><span
class="o">,</span> <span class="mf">45.811716</span><span class="o">)),</span>
<span class="n">numPartitions</span> <span class="k">=</span> <span
class="mi">2</span><span class="o">)</span>
+
+<span class="n">drmData</span><span class="o">.</span><span
class="n">collect</span><span class="o">(::,</span> <span class="mi">0</span>
<span class="n">until</span> <span class="mi">4</span><span class="o">)</span>
+
+<span class="k">val</span> <span class="n">drmX</span> <span
class="k">=</span> <span class="n">drmData</span><span class="o">(::,</span>
<span class="mi">0</span> <span class="n">until</span> <span
class="mi">4</span><span class="o">)</span>
+<span class="k">val</span> <span class="n">y</span> <span class="k">=</span>
<span class="n">drmData</span><span class="o">.</span><span
class="n">collect</span><span class="o">(::,</span> <span
class="mi">4</span><span class="o">)</span>
+<span class="k">val</span> <span class="n">drmXtX</span> <span
class="k">=</span> <span class="n">drmX</span><span class="o">.</span><span
class="n">t</span> <span class="o">%*%</span> <span class="n">drmX</span>
+<span class="k">val</span> <span class="n">drmXty</span> <span
class="k">=</span> <span class="n">drmX</span><span class="o">.</span><span
class="n">t</span> <span class="o">%*%</span> <span class="n">y</span>
+
+
+<span class="k">val</span> <span class="nc">XtX</span> <span
class="k">=</span> <span class="n">drmXtX</span><span class="o">.</span><span
class="n">collect</span>
+<span class="k">val</span> <span class="nc">Xty</span> <span
class="k">=</span> <span class="n">drmXty</span><span class="o">.</span><span
class="n">collect</span><span class="o">(::,</span> <span
class="mi">0</span><span class="o">)</span>
+<span class="k">val</span> <span class="n">beta</span> <span
class="k">=</span> <span class="n">solve</span><span class="o">(</span><span
class="nc">XtX</span><span class="o">,</span> <span class="nc">Xty</span><span
class="o">)</span>
+</code></pre></div>
+<h2>Leveraging Resource Pools and R for Visualization</h2>
+
+<p>Resource Pools are a powerful Zeppelin feature that lets us share
information between interpreters. A fun trick is to take the output of our work
in Mahout and analyze it in other languages.</p>
+
+<h3>Setting up a Resource Pool in Flink</h3>
+
+<p>In Spark based interpreters resource pools are accessed via the
ZeppelinContext API. To put and get things from the resource pool one can be
done simple</p>
+<div class="highlight"><pre><code class="language-scala"
data-lang="scala"><span></span><span class="k">val</span> <span
class="n">myVal</span> <span class="k">=</span> <span class="mi">1</span>
+<span class="n">z</span><span class="o">.</span><span
class="n">put</span><span class="o">(</span><span
class="s">"foo"</span><span class="o">,</span> <span
class="n">myVal</span><span class="o">)</span>
+<span class="k">val</span> <span class="n">myFetchedVal</span> <span
class="k">=</span> <span class="n">z</span><span class="o">.</span><span
class="n">get</span><span class="o">(</span><span
class="s">"foo"</span><span class="o">)</span>
+</code></pre></div>
+<p>To add this functionality to a Flink based interpreter we declare the
follwoing</p>
+<div class="highlight"><pre><code class="language-scala"
data-lang="scala"><span></span><span class="o">%</span><span
class="n">flinkMahout</span>
+
+<span class="k">import</span> <span
class="nn">org.apache.zeppelin.interpreter.InterpreterContext</span>
+
+<span class="k">val</span> <span class="n">z</span> <span class="k">=</span>
<span class="nc">InterpreterContext</span><span class="o">.</span><span
class="n">get</span><span class="o">().</span><span
class="n">getResourcePool</span><span class="o">()</span>
+</code></pre></div>
+<p>Now we can access the resource pool in a consistent manner from the
<code>%flinkMahout</code> interpreter.</p>
+
+<h3>Passing a variable from Mahout to R and Plotting</h3>
+
+<p>In this simple example, we use Mahout (on Flink or Spark, the code is the
same) to create a random matrix and then take the Sin of each element. We then
randomly sample the matrix and create a tab separated string. Finally we pass
that string to R where it is read as a .tsv file, and a DataFrame is created
and plotted using native R plotting libraries.</p>
+<div class="highlight"><pre><code class="language-scala"
data-lang="scala"><span></span><span class="k">val</span> <span
class="n">mxRnd</span> <span class="k">=</span> <span
class="nc">Matrices</span><span class="o">.</span><span
class="n">symmetricUniformView</span><span class="o">(</span><span
class="mi">5000</span><span class="o">,</span> <span class="mi">2</span><span
class="o">,</span> <span class="mi">1234</span><span class="o">)</span>
+<span class="k">val</span> <span class="n">drmRand</span> <span
class="k">=</span> <span class="n">drmParallelize</span><span
class="o">(</span><span class="n">mxRnd</span><span class="o">)</span>
+
+
+<span class="k">val</span> <span class="n">drmSin</span> <span
class="k">=</span> <span class="n">drmRand</span><span class="o">.</span><span
class="n">mapBlock</span><span class="o">()</span> <span
class="o">{</span><span class="k">case</span> <span class="o">(</span><span
class="n">keys</span><span class="o">,</span> <span class="n">block</span><span
class="o">)</span> <span class="k">=></span>
+ <span class="k">val</span> <span class="n">blockB</span> <span
class="k">=</span> <span class="n">block</span><span class="o">.</span><span
class="n">like</span><span class="o">()</span>
+ <span class="k">for</span> <span class="o">(</span><span class="n">i</span>
<span class="k"><-</span> <span class="mi">0</span> <span
class="n">until</span> <span class="n">block</span><span
class="o">.</span><span class="n">nrow</span><span class="o">)</span> <span
class="o">{</span>
+ <span class="n">blockB</span><span class="o">(</span><span
class="n">i</span><span class="o">,</span> <span class="mi">0</span><span
class="o">)</span> <span class="k">=</span> <span class="n">block</span><span
class="o">(</span><span class="n">i</span><span class="o">,</span> <span
class="mi">0</span><span class="o">)</span>
+ <span class="n">blockB</span><span class="o">(</span><span
class="n">i</span><span class="o">,</span> <span class="mi">1</span><span
class="o">)</span> <span class="k">=</span> <span class="nc">Math</span><span
class="o">.</span><span class="n">sin</span><span class="o">((</span><span
class="n">block</span><span class="o">(</span><span class="n">i</span><span
class="o">,</span> <span class="mi">0</span><span class="o">)</span> <span
class="o">*</span> <span class="mi">8</span><span class="o">))</span>
+ <span class="o">}</span>
+ <span class="n">keys</span> <span class="o">-></span> <span
class="n">blockB</span>
+<span class="o">}</span>
+
+<span class="n">z</span><span class="o">.</span><span
class="n">put</span><span class="o">(</span><span
class="s">"sinDrm"</span><span class="o">,</span> <span
class="n">org</span><span class="o">.</span><span class="n">apache</span><span
class="o">.</span><span class="n">mahout</span><span class="o">.</span><span
class="n">math</span><span class="o">.</span><span class="n">drm</span><span
class="o">.</span><span class="n">drmSampleToTSV</span><span
class="o">(</span><span class="n">drmSin</span><span class="o">,</span> <span
class="mf">0.85</span><span class="o">))</span>
+</code></pre></div>
+<p>And then in an R paragraph...</p>
+<div class="highlight"><pre><code class="language-r"
data-lang="r"><span></span>%spark.r <span class="p">{</span><span
class="s">"imageWidth"</span><span class="o">:</span> <span
class="s">"400px"</span><span class="p">}</span>
+
+<span class="kn">library</span><span class="p">(</span><span
class="s">"ggplot2"</span><span class="p">)</span>
+
+sinStr <span class="o">=</span> z.get<span class="p">(</span><span
class="s">"flinkSinDrm"</span><span class="p">)</span>
+
+data <span class="o"><-</span> read.table<span class="p">(</span>text<span
class="o">=</span> sinStr<span class="p">,</span> sep<span
class="o">=</span><span class="s">"\t"</span><span class="p">,</span>
header<span class="o">=</span><span class="kc">FALSE</span><span
class="p">)</span>
+
+plot<span class="p">(</span>data<span class="p">,</span> col<span
class="o">=</span><span class="s">"red"</span><span class="p">)</span>
+</code></pre></div>
+ </div>
+</div>
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Added: zeppelin/site/docs/0.8.2/interpreter/markdown.html
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--- zeppelin/site/docs/0.8.2/interpreter/markdown.html (added)
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@@ -0,0 +1,343 @@
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+ <title>Apache Zeppelin 0.8.0 Documentation: Markdown Interpreter for
Apache Zeppelin</title>
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syntax designed so that it can be converted to HTML. Apache Zeppelin uses
markdown4j.">
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Management</a></li>
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+ <!--<li><a
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Loading (Experimental)</a></li>-->
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(Experimental)</a></li>
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+ <li><a
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Actions</a></li>
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Context</a></li>
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API</a></li>
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class="dropdown-toggle">Setup<b class="caret"></b></a>
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to Build Zeppelin</a></li>
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+ <!--<li><a
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+ <li class="title"><span>Security</span></li>
+ <li><a
href="/docs/0.8.0/setup/security/authentication_nginx.html">HTTP Basic Auth
using NGINX</a></li>
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+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Notebook Storage</span></li>
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Storage</a></li>
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Storage</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Operation</span></li>
+ <li><a
href="/docs/0.8.0/setup/operation/configuration.html">Configuration</a></li>
+ <li><a
href="/docs/0.8.0/setup/operation/proxy_setting.html">Proxy Setting</a></li>
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href="/docs/0.8.0/setup/operation/upgrading.html">Upgrading</a></li>
+ <li><a
href="/docs/0.8.0/setup/operation/trouble_shooting.html">Trouble
Shooting</a></li>
+ </ul>
+ </li>
+
+ <li>
+ <a href="#" data-toggle="dropdown"
class="dropdown-toggle">Interpreter <b class="caret"></b></a>
+ <ul class="dropdown-menu scrollable-menu">
+ <li class="title"><span>Interpreters</span></li>
+ <li><a
href="/docs/0.8.0/usage/interpreter/overview.html">Overview</a></li>
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+ <li><a href="/docs/0.8.0/interpreter/spark.html">Spark</a></li>
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+ <li><a
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+ <li role="separator" class="divider"></li>
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+ <li><a href="/docs/0.8.0/interpreter/flink.html">Flink</a></li>
+ <li><a href="/docs/0.8.0/interpreter/geode.html">Geode</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/groovy.html">Groovy</a></li>
+ <li><a href="/docs/0.8.0/interpreter/hbase.html">HBase</a></li>
+ <li><a href="/docs/0.8.0/interpreter/hdfs.html">HDFS</a></li>
+ <li><a href="/docs/0.8.0/interpreter/hive.html">Hive</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/ignite.html">Ignite</a></li>
+ <li><a href="/docs/0.8.0/interpreter/kylin.html">Kylin</a></li>
+ <li><a href="/docs/0.8.0/interpreter/lens.html">Lens</a></li>
+ <li><a href="/docs/0.8.0/interpreter/livy.html">Livy</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/markdown.html">Markdown</a></li>
+ <li><a href="/docs/0.8.0/interpreter/neo4j.html">Neo4j</a></li>
+ <li><a href="/docs/0.8.0/interpreter/pig.html">Pig</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/postgresql.html">Postgresql, HAWQ</a></li>
+ <li><a href="/docs/0.8.0/interpreter/r.html">R</a></li>
+ <li><a
href="/docs/0.8.0/interpreter/scalding.html">Scalding</a></li>
+ <li><a href="/docs/0.8.0/interpreter/scio.html">Scio</a></li>
+ <li><a href="/docs/0.8.0/interpreter/shell.html">Shell</a></li>
+ </ul>
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+ <li>
+ <a href="#" data-toggle="dropdown"
class="dropdown-toggle">More<b class="caret"></b></a>
+ <ul class="dropdown-menu scrollable-menu" style="right: 0; left:
auto;">
+ <li class="title"><span>Extending Zeppelin</span></li>
+ <li><a
href="/docs/0.8.0/development/writing_zeppelin_interpreter.html">Writing
Zeppelin Interpreter</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Helium (Experimental)</span></li>
+ <li><a
href="/docs/0.8.0/development/helium/overview.html">Overview</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_application.html">Writing Helium
Application</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_spell.html">Writing Helium
Spell</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_visualization_basic.html">Writing
Helium Visualization: Basics</a></li>
+ <li><a
href="/docs/0.8.0/development/helium/writing_visualization_transformation.html">Writing
Helium Visualization: Transformation</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>Contributing to Zeppelin</span></li>
+ <li><a href="/docs/0.8.0/setup/basics/how_to_build.html">How
to Build Zeppelin</a></li>
+ <li><a
href="/docs/0.8.0/development/contribution/useful_developer_tools.html">Useful
Developer Tools</a></li>
+ <li><a
href="/docs/0.8.0/development/contribution/how_to_contribute_code.html">How to
Contribute (code)</a></li>
+ <li><a
href="/docs/0.8.0/development/contribution/how_to_contribute_website.html">How
to Contribute (website)</a></li>
+ <li role="separator" class="divider"></li>
+ <li class="title"><span>External Resources</span></li>
+ <li><a target="_blank" href="">Mailing List</a></li>
+ <li><a target="_blank" href="">Apache Zeppelin Wiki</a></li>
+ <li><a target="_blank" href="">Stackoverflow Questions about
Zeppelin</a></li>
+ </ul>
+ </li>
+ <li>
+ <a href="/docs/0.8.0/search.html" class="nav-search-link">
+ <span class="fa fa-search nav-search-icon"></span>
+ </a>
+ </li>
+ </ul>
+ </nav><!--/.navbar-collapse -->
+ </div>
+ </div>
+
+
+
+ <div class="content">
+
+<!--<div class="hero-unit Markdown Interpreter for Apache Zeppelin">
+ <h1></h1>
+</div>
+-->
+
+<div class="row">
+ <div class="col-md-12">
+ <!--
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+<h1>Markdown Interpreter for Apache Zeppelin</h1>
+
+<div id="toc"></div>
+
+<h2>Overview</h2>
+
+<p><a href="http://daringfireball.net/projects/markdown/";>Markdown</a> is a
plain text formatting syntax designed so that it can be converted to HTML.
+Apache Zeppelin uses <a href="https://github.com/sirthias/pegdown";>pegdown</a>
and <a href="https://github.com/jdcasey/markdown4j";>markdown4j</a> as markdown
parsers.</p>
+
+<p>In Zeppelin notebook, you can use <code>%md</code> in the beginning of a
paragraph to invoke the Markdown interpreter and generate static html from
Markdown plain text.</p>
+
+<p>In Zeppelin, Markdown interpreter is enabled by default and uses the <a
href="https://github.com/sirthias/pegdown";>pegdown</a> parser.</p>
+
+<p><img
src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/markdown-interpreter-setting.png"
width="60%" /></p>
+
+<h2>Example</h2>
+
+<p>The following example demonstrates the basic usage of Markdown in a
Zeppelin notebook.</p>
+
+<p><img
src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/markdown-example.png"
width="70%" /></p>
+
+<h2>Mathematical expression</h2>
+
+<p>Markdown interpreter leverages %html display system internally. That means
you can mix mathematical expressions with markdown syntax.
+For more information, please see <a
href="../usage/display_system/basic.html#mathematical-expressions">Mathematical
Expression</a> section.</p>
+
+<h2>Configuration</h2>
+
+<table class="table-configuration">
+ <tr>
+ <th>Name</th>
+ <th>Default Value</th>
+ <th>Description</th>
+ </tr>
+ <tr>
+ <td>markdown.parser.type</td>
+ <td>pegdown</td>
+ <td>Markdown Parser Type. <br/> Available values: pegdown, markdown4j.</td>
+ </tr>
+</table>
+
+<h3>Pegdown Parser</h3>
+
+<p><code>pegdown</code> parser provides github flavored markdown.</p>
+
+<p><img
src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/markdown-example-pegdown-parser.png"
width="70%" /></p>
+
+<p><code>pegdown</code> parser provides <a href="http://yuml.me/";>YUML</a> and
<a href="https://www.websequencediagrams.com/";>Websequence</a> plugins also.
</p>
+
+<p><img
src="/docs/0.8.0/assets/themes/zeppelin/img/docs-img/markdown-example-pegdown-parser-plugins.png"
width="70%" /></p>
+
+<h3>Markdown4j Parser</h3>
+
+<p>Since <code>pegdown</code> parser is more accurate and provides much more
markdown syntax <code>markdown4j</code> option might be removed later. But keep
this parser for the backward compatibility.</p>
+
+ </div>
+</div>
+
+
+ <hr>
+ <footer>
+ <!-- <p>© 2019 The Apache Software Foundation</p>-->
+ </footer>
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